ARPA

Question 1

When acquiring a target using ARPA, describe 6 items of information that are required to be made available under the ARPA performance standard

Answer 1

Present Bearing of target
Present Range of target
CPA
TCPA
Course
Speed

Question 2

Describe the practical use and benefits of a ground stabilised ARPA display.

Answer 2

Vessel will have speed over ground and course over ground input.
Used for pilotage to accurately navigate in close proximity to fixed objects.